Traffic signal



=Ap ril 30, 1929- c. A. B. HALVORSON, JR 1,711,477

TRAFFI C SIGNAL Original Filed Oct; 31, 1924 2 Sheets-Sheet 1 Fig. 1.

Invemto r Cromwell A.E .I' c1Ivorson, Jr,

by M Q f His Attorr'l 91 1.

Pril 30, 1929- c. A. B. HALVORSON. JR

TRAFFIC SIGNAL Original Filed Oct. 31, 1924 2 Sheets-Sheet Inventor: llAbhclvorson, Jr;

H15 Attorrleg.

C rornwe =1 Patented Apr. 30, 1929.

UNITED STATES PATENT OFFICE.

CROMWELL A. B. HALVORSON, JR., OF LYNN, MASSACHUSETTS, ASSIGNOR TOGENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

TRAFFIC SIGNAL.

Application filed October 31, 1924, Serial No. 747,115. RenewedSeptember 20, 1928.

My invention relates to traffic signals and among the objects of myinvention are the following: to provide a unit with an effective andnovel arrangement of parts, elements of support and of simpleconstruction with the result that the unit may be used if desired exposed to the weather without the necessity of being located within anouter housing. Furthermore, with this type of unit ready access may behad to the inner elements and the unit may be readily and quicklydismounted from the panel support.

The details of the invention will be more readily understood byreferring to the accompanying drawings in which Fig. 1 shows the unit inperspective with the lens element and the reflector element clampedtogether through the medium of a pin and slot lock shown in Fig. 2; Fig.2 shows the reflector element alone, and Fig. 3 shows the lens elementalone in perspective; Fig. 4 is a front view of a unit, and Fig. 5 is aside view in section of the same along the axis 5-5 of Fig. 1; Fig. 6 isa similar view of the unit along the axis 6-6, Fig. 4; Fig. 7 shows anumber of the units mounted in place on the panel.

Referring more in detail to the drawings, it will be seen that the lenselement, Fig. 3, comprises front and rear plates 2 and 3, respectively,between which the lens 4:, Fig. 5, is clamped and between which thepanel element 5, Fig. 5, is clamped by means of the screws 6 and wingednuts 7. It will be seen that the rear plate 3 is provided with anannular collar 8, Fi 3, which is provided in turn with bayonet lock slot9. WVith this construction the lens element of the traflic unit may bepermanently secured to the panel 5, Fig. 7, and in practice as many ofthese units are set up as may be necessary for the purpose of giving thenecessary traffic signals, such as Go, Stop, Right, Left, etc. Thereflector section of the unit, however, is arranged so that it mayberemoved in a moments notice without the necessity of having to loosenbolts or other more or less stationary mechanical locking devices, asshown in Figs. 5 and 6. The reflector 10 is completely enclosed within acasing which comprises a rear concave element 11 and a front concaveelement 12 both of which are clamped together along the equatorialregion of the element by means of bolts 13 and hold between them thereflector 10. The forward section of the casing 12 is provided with anannular collar 14, Fig. 2, which is provided in turn with pins 15. Theannular collar 14 is adapted to be inserted within the annular flange 8,Fig. 3, so that the pins 15 enter the slots 9 whereupon the reflectorelement is locked in place and the pins are seated in the slots 9 asindicated in Fig. 6. The rear section 11 of the lens enclosing casing isformed with a rearwardly projecting collar 16 which serves as abearingfor the socket 17 which holds the light source 18 within thereflector. The reflector itself is, of course, provided with an openingthrough which the socket may project as shown in Figs. 5 and 6.

It will be seen, therefore, that the front of the panel may be madepermanent while the sections of the light projector which extend to therear of the panel may be quickly and readily removed and restored intoplace in case new lamps are to be substituted.

While I have described my invention in connection with a specific formof device disclosed in the drawings it will be understood that I do notwish to be limited to the specific construction shown inasmuch as theinvention may be varied and modified without departing from the spiritthereof or from the scope of the claims therein.

lVhat I claim as new and desire to secure by Letters Patent of theUnited States, is 1. In a traflic signal device a panel support, a pairof clamping plates, an opening in said panel, a lens clamped in saidopening between said plates, the circumferential region of the openingbeing also clan'iped between said plates, said panel serving support forthe plates, a reflector element comprising a focaliziug reflector and anenclosing casing for the reflector, and an opening through one end ofthe casing and of the reflector for receiving a lamp socket and a lampin said socket projecting through said opening with the light sourcelocated within a region about the focus of the reflector and a pin andslot lock for clamping the reflector element to the panel to bring thereflector, the light source and lens into optical relation along acommon axis.

2. In a traffic signal device a panel support, a pair of clampingplates, an openingin said panel, a lens clamped in said opening betweensaid plates, the circumferential region of the opening being alsoclamped between. said. plates, said panel serving as a support for theplates, a reflector element comprising a focalizing reflector and anenclosing casing for the reflector, and an opening through one end ofthe casing and of the reflector for receiving a lamp socket, a lamp insaid socket, a pin and slot lock for clamping the reflector element tothe panel to bring the reflector, the lamp and lens into opticalrelation along a common axis, said lock comprising a collar on thesupport and a collar on the reflector element arranged to slide into oneanother, said pins being on one collar and said slots on the othercollar.

3. A panel of traffic signals, each compris ing a light projector and alens, an opening in said panel for receiving said lens, and means forremovably securing said projector to said panel behind said lens wherebya beam of light may be projected through the lens, said projectorforming a unit comprising; a light source and a reflector, means forsecuring said lens in said opening independently of said projectorwhereby the projector may be removed from the panel without removing thelens, the means for securing said projector to said panel comprising amechanical device embodying a pin and slot lock and the means forsecuring the lens in said opening comprising a pair of plates clampedabout said opening, one of said plates serving as means through whichthe projector is secured to said panel.

4. A projector comprising a globular refiector and a casing forenclosing said reflector formed in two sections, bolts for clamping andunclamping said sections about said globe whereby the sections may beseparated and the globe removed or a new one substituted, the reflectorhaving a front opening and the front section of the casing having afront opening, both openings arranged in juxtaposition and having acommon axis, the rear part of the reflector being provided with anopening and the rear section of the casing being provided with acorresponding opening, both openings having a common axis.

5. A projector com arising aglobular reflector and a casing "orenclosing said retlector formed in two sections, means for clamping andunclamping said sections about said reflector whereby the sections maybe separated and the globe removed or a new one substituted, thereflector having a front opening and the front section of the casinghaving a front opening, both openings arranged in juxtaposition andhaving a common axis, the rear part of the reflector being provided withan opening and the rear section of the casing being provided with acorresponding opening, both openings having a common axis, and a supportfor a light source for the projector, said light support, reflector andeasing forming a unit, a panel, a lens in said panel, and means disposedabout the front opening of the reflector for securing the unit to thepanel in juxtaposition with the lens.

6. In a light projector, a panel, an opening in said panel, a lens insaid opening, a pair of rings, the openings in said rings being small orthan the opening in the panel, means for clamping said panel betweensaid rings with the rings overlapping the oaening whereby said lens isimprisoned in said opening in the panel between said rings, one of saidrings being provided with a flange disposed in a direction transversethe face of the panel, a source of light, and means for clamping saidsource to said flange in a position opposite the lens and along the axisof the lens for proj ect-ing light through and beyond the lens.

In witness whereof, I have hereunto set my hand this 30th day ofOctober, 1924:.

CRO MlVELL A. B. HALVORSUN, Jn.

